Loose-leaf binder



Oct. 29, 1929. c. H. FRANZ, JR

LOOSE LEAF BINDER vFiled Auges, 1923 a my Patented Oct. 29, 1929 TESPATET CHARLES II. EEANZ, .IE.,VE MILWAUKEE, WISCONSIN LOOSE-LEAF BINDERA Application led August 25, 1928. Serial No. 302,034; .I

' This invention relates to a loose leaf binder,

V In loose leaf binders, as heretofore constructed, two general typeshave been employed. One of these types uses a locking slide for lockingthe binder closed, and another type uses adjustable screws for lockingthe binders together, and holding the sheets. This invention is designedto provide a loose Aleaf binder, which has the advantages of both i 1o aquickly operable locking slide, and also that of the adjustable screws,so that `the device may be quickly locked or unlocked, and also Vso thatthe screws may be adjusted to ,exert any desired degree of pressure uponthe en! Y closed sheets.

This invention is an improvement over that disclosed in my co-pendingapplication for loose leaf binder, Serial No. 35,084, iiledJ une 5,1925.

Further objects of this invention are to provide a loose leaf binder, inwhich the screws are provided with heads accessible outside of thebinder after the locking slide has been operated to lock the binderparts together,

i 79.5 so that the screws may be adjusted, after the locking has takenplace, from the outside of the binder, and a further object is to soconstruct the screws that they provide shoulders immediately below theconstricted necks so Eso that the top of the binder cannot drop down outof place during positioning and so that the slide is, in all adjustmentsheld in correct alinement with the constricted necks of the SCGWS.

An embodiment of the invention is shown in the accompanying drawings, inwhich:

Figure 1 is a fragmentary Vertical, sectional view through a portion ofthe binder, such view corresponding to'a section on line 1-41 of Figure2.

Figure 2 is a sectional view on the line QF -2 of Figure 1.

Figure 3 is an enlarged sectional view on line 3-3 of Figure 2. f

Referring to the drawings, it will be seen that the binder is providedwith a pair of covers which are flexibly joined to the backy of thebinder. For convenience, one of the covers, as indicated by thereference character 1, will be termed the bottom cover, and the Vvidedwith an enlarged integral collar 13 and Awith a manipulating head 14 oflesser diame- Vis provided with areinforcing eyelet 17 which other,indicated by reference character 2, the top cover. These covers arejoined to slidablyas-sociated back portions 3` and '4, arranged atright-angles to the closure planes of the covers. lThese 'back portionsare reinforced by means `of the L-shapied metal reinforcing plates 5 and6. Suitable filling members are employed in the covers, as indicated at7. In addition to this, each cover ispro` vided with a flexiblereinforcing strip 8, and the faces are finished by the cover strips orouter sheets 9. The filling strips 7 stop short at a slight space fromthe backV of the binder to provide the requisite flexibility at thispoint in the well known manner.

The bottom of the binder is provided with a plurality of tubular posts10 which are riveted to the metal reinforcing plate 5, as shown inFigure 1, and if desired a filling strip 11 may be positioned 4below thebottomof the posts. These tubular posts 10 extend upwardly and arevpreferably constricted at their upper ends and threaded to receive theadjustable screws 12. These screws are each proter than the collar. The'head 14 and the collar 13Yof these screws are separated or spaced apartby al constricted neck 15. All parts of the screw are preferably formedinte- 80 grally. y

The upper cover is provided with a metallic rectangular casing-16 whichmay be secured to the metal member 6, and which is covered by themembers 8 and 9, as shown in Figure 1. The upper binder cover is prosvided with apertures completelytherethrough y to permit the passageofthe head 14 through such apertures. Preferably the upper binder may beformed of metal, if desired.

The rectangular guide 16 is provided with slots 18, vopening from itsinner edgeat regular intervals. Itis to be noted that the rectangularmember 16, or guide, is provided with a locking slide 19, havingopenings 20 through its forwardedge .to be aligned with the Slots 18when required and iszalso provided with a slotp21'which extendslongitudinally of the slide. Whilethis construction is not essential tothis type of binder, it is so constructed that it can be used with othertypes as well as this one, thus reducing the cost of construction.

It is desirable, in these binders, to provide them with a compressionplate 26 equipped with tubular, downwardly extending members 27 adaptedto slide'over the screws and posts, as shown in Figure l.

In using the device, a stack of sheets, i'ndicated generally at 28, ispositioned upon the posts and the plate 26 slipped into placerover theposts. j Thereafter the cover is positioned and the slide is locked tothe screws by sliding it laterally of the cover so thatthe constrictedneck portions of the screws,- as indicated at l5, are received in theconstricted slots 2l of the slide (see Figure 2). Vl`hereafter thescrews are tightened by any suitable means, for example a coin, untilthe requisite pressure is exerted upon the sheets. It is vto be noted inthis connection that the screws are freely accessible from the outsideof the binder after the binder is locked.

The' sheets are thus held not merely by the posts, but also by definiteand positive frictional grip exerted at their attached end, thusavoiding any possible chance of the sheets tearing away from the posts.when they are subjected inadvertently to unusual strains. Also, it is tobe noted that the speed of the quickly detach-able binders ispreservedby this construction and the advantages of the screw-type of binder areat the same time secured. y'

Grdinarily the device is so adjusted by means of the screws thatfrictional pressure is exerted upon the sheets and also upon the slide.The slide cannot be inadvertently detached, but may be detached underthese conditions by merely pressing downwardly with one hand upon thetop of the binder. Y However, if it is desired to insure the locking ofthe slide against any motion whatsoever, the screws. may be tightened toa greater extent to thereby firmly lock the slide against motion. f

, Further, it is to be noted that the device is extremely simple andrugged andis easily produced. h Y Y Although the invention has vbeendescribed inl considerable detail, such description is in- 1 tended asillustrative rather lthan limiting as the invention may be variouslyembodied and Y as the scope of such invention is to be determined asclaimed.

l I claim n 1. A loose leaf binder comprising an upper and a lowercover, means carried by the lower cover for adjustably joining saidcovers, said means including screws, means carried by the upper coverfor quickly locking such upper cover to said screws, said upper coverbeing apertured to expose the heads of said screws, said screws havingcollars spaced downwardly from the heads for preventing the upper coverfrom sliding downwardly upon said screws beyond a predetermineddistance.

2. A loose leaf binder comprising an upper and a lower cover adapted toreceive sheets between them, a plurality of posts carried by said lowercover, adjustable screws threaded into the upper ends of said posts,said screws having heads and enlarged collars spaced downwardly fromsaid heads, a guide carried by said upper cover and having openingsthrough which the heads of the screws may project, said openings beingof a size to prevent the passages therethrough of said collars, and alocking slide carried by said guide for engaging and locking the screwsbetween the heads and collars, said upper cover having aperturesarranged to expose the heads of said screws.

have hereunto set my hand at Milwaukee, in

, A j In testimony that I cla1m the foregoing I the county of Milwaukeeand State. of Wisy consin.

CHARLES H. FRANZ, Jn.

